Improvement in geaduated bevel squaees



BICKFORD & FLANDERS.

Graduated Bevel Squa Patented June 11, 1867..

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SOLOMON E. BlGKFOR-D, AND FREDERICK FLANDERS, OF FRANKLIN, NEW HAMPSHIRE.

Letters Patent No. 65,532, dated June 11, 1867.

IMPROVEMENT IN GRADUATED BEVEL SQUARES.

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TO ALL WHOM IT MAY CONCERN:

Be it known that we, SOLOMON E. Brcuronn and FREDERICK FLANDERS, of Franklin, in the county of Merrimac, and State of New Hampshire, have invented certain Improvements in Bevel Squares, of which the following is a full, clear, and exact description, reference being bad to the accompanying drawings, making part of this specification in which-- Figure 1 is a plan of our improved square.

Figure 2 is a plan of a. portion of the same enlarged.

Figure 3 is a section on the line we of fig. 2.

To provide a means whereby the operation of sawing mitrcs or bcvels may be facilitated is the object of our invention, which consists in two blades pivoted together, one of them being provided with an inner and outer scale, and the other so formed as to serve as an indicator, by which any degreeof inclination required for a mitre or bevel may be determined in a simple and expeditious manner. I

To enable others skilled in the art to understand and use our invention, we will proceed to describe the manner irmvhich we have carried it out.

In the said drawings, A represents a blade of steel or other suitable material, one end of which is square, while the other end is rounded ofi'i'n the form of a semicircle, a, which is accurately subdivided into equal parts representing degrees. Through the centre of this semicircle a passes a pin, 11, the upper end of which is provided with a screw-thread, c, the pin 6 serving as an axis or centre around which another metal blade, B, ismade to revolve, a circular hole being made in the inner end of the blade B to allow of its fitting over the pin.

.The inner end of the blade B is also made in the i'drni of a semicircle, cl, the diametcriof which is less than that a on the blade A, forming shoulders or indicators 0, by which construction the graduated scales on the blade A are exposed to view, and their angles indicated by one of the shoulders e, notches being formed to facilitate the reading of the figures. C is a nut, which turns over the screw-thread c, and is brought down upon a Washer,f, when it is required to clamp the blades together in any desired position.

By the employment of a square constructed as above described, when it is required to match two pieces, so that, when their ends are joined together, they will perfectly fit each other, and form a given angleof bevel, (for instance one hundred and fifty dcgrces,) it is simply necessary to incline the blades A B to the desired angle, when that (seventy-five degrees) of the mitre to be cut away may be readily observed on the inner scale on" the I same line as that which denotes the angle of bevel on the outer scale.

. Claim. What we claim as our invention, and desire to secure by Letters Patent, is-- The withimdcscribed bevel square, consisting of the bladeA, with its inner and outer scales, and the blade B, with its indicators e, connected by the screw-pin b and nut C, or their equivalents, arranged and operating substantially as set forth.

SOLOMQN E. BICKFORD, FREDERICK FLANDERS.

Witnesses:

F. K. SMITH, J. W. SWEAT. 

